Analisis Pengaruh Additive Graphene Oxide Terhadap Compressive Strength Dan Shear Bond Strength Semen Pemboran

Compressive Strength (CS) and Shear Bond Strength (SBS) are indicators in determining the quality of drilling cement. Strong CS and SBS will bond the casing to the formation walls thereby preventing fluid movement through the annular space, protecting and helping the casing stop fluid movement into the fractured formation. The additive that is commonly used to increase the strength of cement is bentonite, but because it absorbs a lot of water so that the volume of cement suspension increases, for every addition of 1% bentonite must be added 5.3% water (BWOC) API, which means the cement yield, permeability and viscosity values increase but the value increases. compressive strength decreased. However, along with technological developments in the field of nanotechnology materials, Graphene Oxide (GO) is very likely to increase the CS and SBS values of drilling cement. In this study GO was prepared by synthesizing oil palm shells using a pyrolysis tool for 12 hours at 300°C to obtain 400 mesh carbon, the carbon was exfoliated by the Liquid Phase Exfoliation method using acetone sonicated for 4 hours, then centrifuged at 1000 speed. RPM for 3 hours at room temperature. Samples were tested by XRD to identify and analyze the phase of graphene oxide. Furthermore, the sample is used in the drilling cement suspension and tested at various concentrations of how much the compressive value and the shear bond strength get optimal results. Variations in the concentration of GO oil palm shell samples were 0.02%, 0.035%, 0.05%, 0.065% and 0.08% and then compared with standard cement. Based on the XRD test, the peak value of carbon diffraction is 29o and the GO diffraction is 26.64o, this indicates the formation of crystals with a hexagonal system in accordance with the ICSD. The increase of 0.02% to 0.065 % GO the CS value of cement increased, but at 0.08% decreased and obtained at 0.065% GO was the optimum CS value from 2730.02psi (standard cement) to 4407.83psi. And from an increase of 0.02% to 0.05% GO the SBS value continued to increase but at 0.065% it decreased and the result was 0.05% which was the optimum SBS value from 550.38psi (standard cement) to 812.41psi